Polymers of quaternary ammonium compounds used as wet strength agents in paper
Abstract
Abstract THIS INVENTION IS CONCERNED WITH MONOETHYLENICALLY UNSATURATED ACID ESTER MONOMERS, SUCH AS THOSE OF ACRYLIC OR METHYACRYLIC ACID, CONTAINING A QUATERNARY AMMONIUM HALIDE GROUP HAVING A SUBSTITUENT ON THE QUATERNARY NITROGEN ATOM OF THE FORMULA -CH2CH(OH)CH2X WHEREIN X IS CHLORIDE, BROMINE OR IODINE. IT IS ALSO CONCERNED WITH ADDITION POLYMERS OF SUCH MONOMERS, AND METHODS OF PRODUCING THE MONOMERS AND POLYMERS. THE MONOMERS AND POLYMERS ARE STABLE AT ACID PH VALUES, ALTHOUGH CAPABLE OF REACTING WITH OTHER REACTANTS FOR THE HYDROXYL AND/OR HALIDE GROUP. ON HEATING, THEY ARE SELF-REACTIVE AND BECOME CROSS-LINKED. AT ALKALINE PH VALUES, THEY BECOME SELF-REACTIVE AND THE POLYMERS CROSSLINK THEMSELVES BY SLOW REACTION EVEN AT ROOM TEMPERATURE. HOWEVER, THE CROSS-LINKING REACTION BECOMES QUITE RAPID ON HEATING. THE INVENTION ALSO CONCERNS THE USE OF THESE POLYMERS AS WET-STRENGTH AGENTS IN MAKING PAPER AND AS ELECTROCONDUCTIVE AIDS IN THE MAKING OF VARIOUS ELECTRODUCTIVE PAPERS FOR ELECTROSTATIC IMAGE REPRODUCTION SYSTEMS.
Inventors
- 👤 Sheldon N Lewis
- 👤 Richard F Merritt
- 👤 William D Emmons
Bibliographic Details
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